Sorting import by length, imported objects alphabetically

[dvarrazzo]

Hello,

I am trying isort on psycopg codebase (psycopg/psycopg#1006). So far I have informally used a style ordering imports by length and imported objects alphabetically, e.g.

from long import aaaa, bbb, cc
from longer import aaaa, bbb, cc
from longest import aaaa, bbb, cc

With the configuration:

[tool.isort]
profile = "black"
length_sort = true
multi_line_output = 9

the ordering by length is respected, but the imported objects are ordered by length too:

from long import cc, bbb, aaaa

Is there a way to use alphabetical order for the imported objects? Even writing an ordering plugin doesn't seem to help as it seems the ordering is used both for modules and objects without the possibility of telling them apart.

[dvarrazzo]

I have hacked isort with this mung to tell apart when the sort is being applied to objects or module.

Is there a builtin way to do this instead?

Is this even moral?

[dvarrazzo]

I have put together the isort-psycopg extension, that we started using in our project. If there is a built-in way to do this instead of using this extension I'm happy to know. Conversely, if this extension is useful to anyone, here it is.